|
|
|
| Experiment on hydraulic stability of hydro-turbines in Goupitan hydropower plant on River Wu |
| GONG Ruzhi1, LI Deyou1, WANG Hongjie1, LIU Shixun1, WEI Xianzhu1,2 |
| 1.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China; 2.State Key Laboratory of Hydropower Equipment, Harbin, Heilongjiang 150040, China |
|
|
|
|
Abstract In this study, a series of field experiments are carried out on hydro-turbine unit 1 and unit 5, respectively, in Goupitan hydropower plant to solve the problems such as too large vibration acceleration in unit 1, vibration and hydraulic instability in unit 5 at high flow rates. In the prototype experiments, an advanced data acquisition software LabVIEW and a testing program proposed by NI Hardware are adopted. The experimental results are processed and the reasons for the instability are inferred; subsequently, several measures are proposed, implemented and validated experimentally. It is confirmed that for unit 1 once the runner nut is changed into a cone from the original cylinder the severe pressure pulsation phenomenon disappears at high flow rates. For unit 5, however, even though the thickness of the trailing edge of wicket gate foils has been reduced, the severe pressure pulsation also persists, suggesting Karman vortex street is irresponsible for this effect. This outcome has a referential significance for safe operation of hydro-turbine units in a hydropower plant.
|
|
Received: 27 March 2015
|
|
|
|
| [1]桂中华. 潘罗平, 陆力. 水电机组状态监测与故障诊断研究新进展[J]. 中国水利水电科学研究院学报, 2009,7(3):179-186. GUI Zhonghua, PAN Luoping, LU Li. Advances in condition monitoring and fault diagnosis research of hydropower generator units[J]. Journal of China institute of water resources and hydropower research, 2009,7(3):179-186.(in Chinese)[2]李维藩. 大古力、伊泰普和古里水电站水轮机的运行情况[J]. 水力发电, 1987(3):59-63. LI Weifan. Work condition of Grand Coulee, Itaipu and Kuri hydro power stations[J]. Water power, 1987(3):59-63.(in Chinese)[3]刘胜柱, 郭鹏程, 张乐福, 等. 岩滩水电站3号机减振改造研究[J]. 水力发电学报, 2005,24(5):104-109. LIU Shengzhu, GUO Pengcheng, ZHANG Lefu, et al. Research on decreasing vibration of No.3 turbine unit in Yantan water power plant[J]. Journal of hydroelectric engineering, 2005,24(5):104-109.(in Chinese)[4]乔进国. 五强溪水电厂机组运行稳定性分析[J]. 水电站机电技术, 2003(S1):89-92. QIAO Jinguo. Working stability analysis of Wuqianxi hydro-turbine[J]. Mechanical and electrical technique of hydropower station, 2003(S1):89-92.(in Chinese)[5]李炎. 当前混流式机组水电站厂房结构振动的主要问题和研究现状[J]. 中国农村水利水电, 2009(5):91-94,97. LI Yan. Current main problems and present research on interflow unit hydroelectric station structure vibration[J]. Chinese rural water and hydropower, 2009(5):91-94,97.(in Chinese)[6]KOHOUT S, ROOS J, KELLER H. Automated operation of a homemade torque magnetometer using LabVIEW[J]. Measurement science and technology, 2005,16(11):2240-2246.[7]李德友, 王洪杰, 宫汝志, 等. 基于LabVIEW水轮机模型测试系统设计与试验[J]. 水力发电学报, 2014,33(4):263-268. LI Deyou, WANG Hongjie, GONG Ruzhi, et al. Design and experiment of turbine model testing system based on LabVIEW[J]. Journal of hydroelectric engineering, 2014,33(4):263-268.(in Chinese)[8]李德友, 王洪杰, 刘世勋, 等. 基于NI PXI的水力测试系统[J]. 仪器仪表学报, 2011,32(S12):452-457. LI Deyou, WANG Hongjie, LIU Shixun, et al. Hydraulic test system based on NI PXI[J]. Chinese journal of scientific instrument, 2011,32(S12):452-457.(in Chinese)[9]Hydraulic turbines, storage pumps and pump-turbines. Model acceptance tests: IEC60193—1999[S].[10]潘罗平. 卡门涡诱发的水电机组振动特性研究[J]. 长春工程学院学报(自然科学版), 2010,11(3):134-137,154. PAN Luoping. Study on vibration characteristics induced by Karman vortices for hydropower units[J]. Journal of Changchun Institute of Technology(natural sciences edition), 2010,11(3):134-137,154.(in Chinese) |
|
|
|
